I got into all of that stuff about 2 years ago, and let me just say that it was not worth it. It made everything crash and you could get free games and stuf, but all they did was crash. The only good thing about the jailbreak were the game console emulators.

I jailbroke mine using evasi0n , it was pretty straight forward, just do a backup of your phone and make sure you have a lot of free space on the phone for the exploit to run ( at least a couple of gig ).

NOTE If you have any version of iOS higher than 6.02 or 6.03 jailbreak wont work, look it up on the internet before you go all in.

Let’s not bash the guy about his phone.
I had the iPhone 4 when it came out when I was around 11.

As for jailbreakme, as I remember it, the firmware an IP5 comes in is way past the accepted that JBM would do. When I did it, I think it was around ios4.0.1 maybe even less.

I’m into jailbreaking, but considering that it’s your first phone, either get a person who knows what theyre doing, or just don’t at all. There’s not much to benefit from a jailbreak, unless you’re looking for free games and emulators and customization. But if you wanted that, an android phone was more than readily available. I deem it as a risk for you to do it, especially if you resorted to JBM, when most contemporary jailbreaks require a computer app like redsn0w, greenrain, or the such.